Grate pot



Aug. 13, 1940. N, JAMES ETAL GRATE POT Filed Jan. 6, 1939 9 awe/Hm IVO RIVA N JA MES J05E PH 1/.2 URE/VDA,J R

Patented Aug. 13, 1940 rso srA'rss GRATE POT Norman James and Joseph J. Zurenda, Jr.,

' Edwardsville, "Pa.

Application January 6, weasel-rial No. 249,640

3 Claims.

This invention relates to grate pots for furnace boilers and the like, and has for one of its objects the production of a simple and'efficient grate pot which is so constructed as to receive a circu- 5 lation of water and also to deliver a series of air jets vertically through the bottom of the fire box, to facilitate combustion of the fuel within the fire box.

A further object of this invention is the production of a simple and eflicient grate pot wherein water is circulated through or around the grate pot for pre-heating the water before the water passes to the boiler.

Other objects and advantages of the present invention will appear throughout the following specification and claims.

In the drawing:

Figure 1 is a vertical sectional view through the grate pot and the auxiliary water heating tank, a portion of a boiler also being shown;

Figure 2 is a top plan view of the grate pot;

Figure 3 is a fragmentary top plan view of the baffle or auxiliary tank.

By referring to the drawing it will be seen that a fuel pot C is provided consisting of a single inverted cone-like disc or plate 26 having a bottom fuel opening 2'! and a top laterally extending flange 2B. This plate 26 is provided with a plurality of vertically arranged air ports 29 to 30 provide a plurality of air jets and a spirally arranged water coil 30 is carried by the inner face of the plate 26 having an inlet water supply St at the bottom thereof, and an outlet pipe 32 at the top of the coil 30. The air ports 29 are arranged in staggered concentric rows between the convolutions of the coil 3|]. At least two of the upper convolutions of the coil are arranged to rest upon the flange 28, as shown in Figure 1.

The pot C may be mounted upon a suitable outer shell 2 la, and a suitable fuel supply mechanism of a conventional type as shown may be utilized.

In conjunction with the type of grate pot illustrated, we may provide an auxiliary water heating tank 33 which may be suspended in any suitable or desired position above the pot C as shown in Figure 1, this auxiliary tank 33 having vertically arranged vents 34. A suitable water supply pipe 35 may be provided entering the bottom of the tank 33, and an outlet pipe 36 may be provided leading to a suitable boiler. This auxiliary tank 33 is preferably placed above the pot C and constitutes a baffle for spreading the flames, so that the flames from the fuel within the pot may be spread along the bottom and around the sides of the tank 33 and may also pass up through the vents 34, in this manner providing an auxiliary and additional pre-heating means for water before it passes to the conventional boiler.

It should be understood that the air jets which 5 are discharged from the air ports 29 will blow the dust portions of the ashes upwardly to keep the ports 29 free from clogging. The convolutions of the coil 3!] also support the heavy particles in a manner whereby the heavy particles of ashes 10 and fuel will be spaced away from the body of the pot.

The operation of the device is as follows:

The fuel is forced through the bottom of the pot C by a suitable conveyor and up through the 15 fuel feeding opening 2! into the inverted conelike pot C. The air will pass up through the compartment 253 from a supply tube I8 and up through the ports 29 in a direct vertical path and then through the fuel within the pot, thereby 20 greatly facilitating combustion of the fuel. The water jacket 23 within which a fresh supply of water is continually maintained, will sufficiently chill the walls of the air supply tube I8 to cause the same to sweat and thereby moisten the air 25 passing through the air supply tube l8 and this moisture-laden air, by passing into the fire box and through the water grate pot in the direction of the arrows shown in Figure 1 will greatly facilitate combustion of the fuel causing all gases to 30 ignite and burn and to greatly reduce danger of obnoxious fumes. The circulation of this water through the coil 30 will cause the water to become pre-heated before the water passes out through the pipe 32. In this way, the heat of the fuel 35 supported within the pot C will be utilized to pre-heat the water before the water passes to the boiler A, to which it may be connected.

It should be understood that the circulation of water through the pot or grate will greatly increase the life of the pot and prevent the same from burning out.

It should be understood that certain detail changes in the construction, combination and arrangement of parts may be employed without 45 departing from the spirit of the invention, so long as such changes fall within the scope of the appended claims.

Having described the invention, what is claimed is: 50

l. A grate pot of the class described comprising a substantially inverted cone-like body having a fuel entrance opening at its lower end, a spirally arranged water coil carried by the inner face of the body, the coil having a water inlet 55 at its lower end and a water outlet at its upper end, and said body having a series of air ports for delivering a series of air jets vertically through the body, the air ports being located between theconvolutions of the water coil.

2. A grate pot of the class described comprising a substantially inverted cone-like body having a fuel entrance opening at its lower end, a spirally arranged water coil carried by the inner face of the body, the coil having a water inlet at its lower end and a water outlet at its upper end, said body having a series of air ports for delivering a series of air jets vertically through the body, the air ports being located between the convolutions of the water coil, said body having a laterally extending flange along its upper edge, and some of the coils resting upon said flange.

3; A grate pot of the class described comprising a substantially inverted cone-like body having a fuel entrance opening, a spirally arranged water coil carried by the inner face of the body, the coil having a water inlet and a water outlet, and said body having a series of air ports for delivering a series of air jets vertically through the body, the air ports being located between the convolutions of the water coil and spaced therefrom and being shielded by the convolutions of the coils in a manner whereby the coils will support the clinkers or heavy portions of the fuel and whereby the air jets will blow the dust portions of the ashes upwardly to keep the ports free from clogging, the convolutions of the coil also supporting the heavy particles in a manner whereby the heavy particles of the ashes and fuel will be spaced away from the body.

NORMAN JAMES.

JOSEPH J. ZURENDA, JR. 

